Tag: introduction to force

Questions Related to introduction to force

In which of the following cases, a force is not being applied?

physics force and types of force introduction to force what is force? concept of force and its unit

  1. A man standing behind a stationary car.

  2. A car being pushed by a man.

  3. A man trying to stop a sliding car.

  4. A man standing on a car.

Show answer
Correct Option: A
Explanation:

For pushing a car, a force is required in the direction of motion of the car. 

In trying to stop a sliding car, a force is required against the direction of motion of the car. 
A man standing on the car applies the force of weight on the car.
But, to stand behind a stationary car, no net force needs to be applied in the car.
Option A

A force can be applied only when it is in contact with an object. Which of the following is the category of this type of force?
physics force and types of force introduction to force what is force? concept of force and its unit

  1. Magnetic force

  2. Contact force

  3. Non-contact force

  4. Muscular force

Show answer
Correct Option: B
Explanation:

When a force can be applied by an object on another only if it is in contact with each other, it is called as a contact force. 

What happens when there is no interaction between the objects?

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Force comes in action.

  2. Force does not come in action.

  3. Force may or may not come in action.

  4. None of the above is correct

Show answer
Correct Option: C
Explanation:

There are two types of force 
1) Interactive force: Its effect comes when two objects will come in contact.
2) Non- Interactive force: Its effect will come when an object comes in their respective field strength.

exp:  Charge in an electric field, Mass in gravitation field.
Hence Option C.

A force acts between two bodies if:

physics force and types of force introduction to force what is force? concept of force and its unit

  1. both the bodies are pushing each other.

  2. both the bodies are pulling each other.

  3. either of the two bodies are pushing or pulling the other body.

  4. all of these

Show answer
Correct Option: D
Explanation:

Force is involved in all kinds of push and pull.

Fill in the blanks:

In the game of tug-of-war, both the teams pulls each other. So ________.

physics force and types of force introduction to force what is force? concept of force and its unit

  1. force is applied due to interaction.

  2. force is not applied although there is interaction.

  3. force is applied although there is an interaction.

  4. none of the above.

Show answer
Correct Option: A
Explanation:

Force always comes into action when there will be interaction between the objects, Here both the teams are exerting force on each other through the rope.

A force when applied on a non rigid object

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Does not change the inter spacing between its constituent particles

  2. Do not cause any change in its dimension

  3. Do not produce motion in it

  4. None

Show answer
Correct Option: D
Explanation:

A force when applied on a non rigid object, changes the inter spacing between its constituent particles and therefore causes change in its dimension and can also produce motion in it.

When a force is applied on a rigid object

physics force and types of force introduction to force what is force? concept of force and its unit

  1. It changes the inter spacing between its constituent particles.

  2. It changes the dimension of the object

  3. It only causes motion in it

  4. All

Show answer
Correct Option: C
Explanation:

A force when applied on a rigid object does not change the inter spacing between its constituent particles and therefore it does not change the dimension of the object.,but cause only motion in it.

If two bodies do not interact

physics force and types of force introduction to force what is force? concept of force and its unit

  1. still a force can be applied

  2. no force can be applied

  3. contact force can be applied

  4. non-contact force can be applied

Show answer
Correct Option: B
Explanation:
If two bodies do not interact there won't be any force between them as
interaction is must for having any sort of force between two bodies.

Mark the incorrect option:

physics force and types of force introduction to force what is force? concept of force and its unit

  1. A force always make an object to move

  2. A force has both magnitude and direction

  3. A force can be represented by an arrow

  4. Force is a vector quantity

Show answer
Correct Option: A
Explanation:

We are to remember that force does not always make an object to move. For example,we may push a large piece of rock without displacing it from its position.We may even push a wall without any success. And, on the other had, we may apply force on a dough by our fingers to change its shape and size. So, a force does not always make an object to move, it may be used to change the shape and size of an object as well.

Force is a vector quantity because it has both magnitude and direction.

Fill in the blank.

When a force is applied on a soft object,it changes the_________ of the object. 

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Shape

  2. Size

  3. Direction of force

  4. Both a and b

Show answer
Correct Option: D
Explanation:

Force can change the shape and size of an object-when a force is applied on a soft object, it changes the shape and size of the object.